FORD WB900 PDF

1. SCOPE.

This standard specifies the general and dimensional requirements of pan head, raised countersunk head and flat countersunk head machine screws and machine screw and machine screw and tooth lock washer assemblies with recess drive systems. Cross recess data is shown in Appendix A. Lobed recess data is shown in Appendix D.   2. REFERENCES. IS0 261 IS0 965 IS0 1502 IS0 4762 IS07721 WA 900 WA 990 -IS0 General purpose metric screw threads -General plan. -IS0 General purpose metric screw threads -Tolerance. -IS0 General purpose metric screw threads -Gauging. -Hexagon socket head cap screws -Product grade A. -Countersunk head screws -Head conf& ration and gauging. -Dimensional requirements for hexagon and flanged hexagon bolts and screws, and hexagon screw and washer assemblies. -Surface discontinuities of bolts and screws.   3. GENERAL REQUIREMENTS. 3.1 DIMENSIONS AND TOLERANCES. The dimensions and tolerances of pan head, raised countersunk hea